Mycobacterium Avium Intracellulare Complex (MAC) Study (MAC)

July 27, 2012 updated by: Mayo Clinic

Pilot Study to Assess Safety and Efficacy of Short Course Multiple Drug Therapy for Adult Patients With Mycobacterium Avium Intracellulare Complex (MAC) Infection Associated With Mulit Focal Bronchiectasis and Multiple Small Nodules

This study is short course (3 month) multiple drug antibiotic therapy. The purpose of this research study is to evaluate the clinical and radiology response to assess whether drug resistance develops and assess quality of life measures with MAC disease.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

The goal of this pilot study is to assess the safety and efficacy of short course (3 months) multiple drug antimicrobial therapy in adults with MAC pulmonary disease associated with multifocal bronchiectasis and multiple small nodules. We propose to evaluate the clinical and radiographic response, assess whether macrolide (either Clarithromycin or Azithromycin) resistance develops, and assess quality of life measures.

No evidence of efficacy is required to proceed to longer term studies; however, we will need to confirm lack of development of macrolide resistance in this pilot study before proceeding to any additional studies to evaluate the efficacy of short course MAC treatment.

Once we have demonstrated the feasibility of short course therapy and confirm that resistance to macrolides does not develop, we hope to apply for external funding to support a longer term randomized controlled trial comparing "standard" MAC therapy (which usually consists of a period of eighteen to twenty-four months with at least three antimicrobials) to short course (three months) MAC antimicrobial treatment, alternating each year with nine months of non-MAC bronchial hygiene measures for two consecutive years. If a larger study confirms efficacy of this approach, we would then propose even larger multi-site studies to test the hypothesis that short course MAC therapy alternating every year with non-MAC bronchial hygiene therapy should be considered in all adult patients with MAC pulmonary disease associated with multifocal bronchiectasis and multiple small nodules throughout their lives.

The longer term goal of this research is to develop an optimal treatment strategy for these patients (in whom MAC will likely persist indefinitely) that will result in not only a better quality of life, but less evidence of long term lung damage, less risk of drug-related morbidity, and be better tolerated by the patients compared to current treatment strategies.

The specific aims of this pilot study are as follows:

Primary Aim:

  1. Confirm that macrolide (either Clarithromycin or Azithromycin) resistance does not develop as a result of short course treatment.

    Secondary Aims:

  2. Assess for change in quality of life metrics (St. George Respiratory Questionnaire and SF 12) from baseline to the conclusion of the study period (six months). We expect to see improvement in quality of life measures as a result of this short course treatment trial.
  3. Assess for change in pulmonary function from baseline to the conclusion of the study period. We expect to see improvement particularly in the FEV1, FEV1/FVC, and diffusing capacity for carbon monoxide as a result of this short course treatment trial.
  4. Assess for change in high resolution computerized tomography (HRCT) of the chest, evidence of MAC pulmonary disease (multifocal bronchiectasis associated with multiple small nodules) from baseline to the conclusion of the study period. We do not anticipate being able to demonstrate improvement in the HRCT evidence of MAC lung disease during the short period of this trial since these changes usually occur quite slowly.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
15

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Florida
      • Jacksonville, Florida, United States, 32224
        • Mayo Clinic

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Fifteen adult patients will be included in this pilot study. This sample size was chosen not on the basis of formal statistical considerations. However, data from 15 patients will be sufficient to provide rough preliminary estimates of parameters that may be needed for developing power statements for a follow-up larger (randomized) trial. If macrolide resistance occurs in 5% or less of patients in this population, with ≥83% probability only one or zero of the 15 patients will develop resistance. If two or more of the 15 patients develop resistance then further investigations of resistance will be warranted before moving on to randomized trials.

Description

Inclusion Criteria:

  1. All patients must meet diagnostic criteria for nontuberculous mycobacterial pulmonary disease as per ATS/IDSA Official Statement (AJRCCM Vol 175 pp 367-416, 2007)
  2. Confirmation both by a chest radiologist and the investigators of multifocal bronchiectasis and multiple small nodules on HRCT scanning of the chest
  3. Repeatedly positive sputum cultures and/or bronchial washings for MAC (in accordance with microbiologic diagnostic criteria outline by the American Thoracic Society)
  4. MAC must be proven to be macrolide (either Clarithromycin or Azithromycin) sensitive at the onset of the study
  5. Age greater than 18
  6. No active treatment for MAC lung disease within the past two years
  7. Patients and their physicians must be willing to discontinue other non-MAC antimicrobials which may have been used as part of their pre-study bronchial hygiene program.

Exclusion Criteria:

  1. History of Cystic Fibrosis or HIV disease
  2. Known allergy or intolerance to any of the proposed antibiotics
  3. Inability to return at three month intervals for testing over the six month study period
  4. Inability to complete quality of life questionnaires
  5. Pregnancy
  6. Presence of any abnormality on baseline ophthalmological examination which would preclude the use of ethambutol.
  7. Coexistence of non-tuberculous mycobacteria other than MAC

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Only
  • Time Perspectives: Prospective

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Mayo Clinic

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Jack P Leventhal, MD, Mayo Clinic Assistant Professor of Medicine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2008

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2011

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 1, 2011

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 20, 2009

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 21, 2009

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 22, 2009

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 30, 2012

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 27, 2012

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 07-004414

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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